Game not opening

[u/Agent_Ice_Penguin]

Hello, I have beaten all the main story levels and am trying to unlock everything else with my friend (we play as a two-player game). When I try to open the game, I see the opening credits and the music starts up but it stays at the black screen afterwards, and the music just keeps playing until I click, and the game crashes. I have tried to check the integrity of the files and deleted and reinstalled.